Method for communicating message between entities in coexistence management system

ABSTRACT

Disclosed are methods of exchanging messages necessary for interaction among entities in a coexistence management system that manages a plurality of frequency sharing devices. Specifically, a method of exchanging messages in a coexistence management system including a coexistence enabler (CE), a coexistence manager (CM), and a coexistence discovery and information server (CDIS) includes generating, by the CM, a ReconfigurationRequest message, sending the ReconfigurationRequest message to the CE, and waiting for a ReconfigurationResponse message from the CE. The ReconfigurationRequest message includes at least one of an operating channel list of a white space object (WSO) served by the CE, a transmission power limitation, a flag indicating whether or not a channel is shared, a transmission schedule, and channel classification information.

TECHNICAL FIELD

The present invention relates to a coexistence management technology, and more particularly, to a method of exchanging messages necessary for interaction between entities in a coexistence management system that manages a plurality of frequency sharing devices.

BACKGROUND ART

A coexistence technology is a spectrum management technology that enables wireless devices using different communication protocols at a core frequency (30 MHz to 10 GHz), in which various dynamic spectrum access (DSA) technologies are expected to emerge, to coexist without harmful interference. The DSA technologies, such as underlay and overlay approaches, which are an opposing concept to a current static spectrum management technology, are wireless access and management technologies in which a spectrum is dynamically managed according to radio environments around wireless devices to maximize flexibility and efficiency of frequency use. To prepare for spectrum sharing technologies which variously emerge for respective wireless services, such as the Institute of Electrical and Electronics Engineers (IEEE) 802 Standards Coordinating Committee (SCC) 41, a technology for deriving coexistence standards capable of comprehensively operating a plurality of sharing technologies in terms of spectrum management by countries is under development.

Domestically, research into integrated coexistence conditions of various sharing technologies for securing optimal frequency efficiency among various white space objects (WSOs) under congested radio environments, such as a frequency auction system and sharing of a licensed band and an unlicensed band, has not been systematically conducted. Technical issues about a coexistence scenario between frequency-sharing wireless systems in a licensed band and an unlicensed band, coexistence analysis, a sharing mechanism for coexistence, etc., are being discussed in the wireless coexistence working group that handles a coexistence problem between the 802 standards in the international standardization organization, the IEEE 802.19.

DISCLOSURE Technical Problem

The present invention is directed to providing inter-entity message delivery methods and message parameters for interference avoidance and efficient resource management in a coexistence management system for managing a plurality of frequency sharing devices.

Technical Solution

One aspect of the present invention provides a method of exchanging messages among a coexistence enabler (CE), a coexistence manager (CM), and a coexistence discovery and information server (CDIS) in a coexistence management system including the CE, the CM, and the CDIS. The method includes: generating, by the CM, a ReconfigurationRequest message and sending the ReconfigurationRequest message to the CE; and waiting for a ReconfigurationResponse message from the CE. The ReconfigurationRequest message includes at least one among a group of an operating channel list of a white space object (WSO) served by the CE, a transmission power limitation, a flag indicating whether or not a channel is shared, a transmission schedule, and channel classification information.

In an exemplary embodiment, the channel classification information may include at least one among a group of an available channel list, a restricted channel list, a protected channel list, an unclassified channel list, an operating channel list, and a coexistence channel list.

In an exemplary embodiment, the method may further include: generating and sending, by the CE having received the ReconfigurationRequest message, a PerformReconfigurationRequest primitive to the WSO served by the CE; receiving, by the CE, a PerformReconfigurationResponse primitive from the WSO; and generating, by the CE, the ReconfigurationResponse message and sending the ReconfigurationResponse message to the CM. The PerformReconfigurationRequest primitive may include at least one among a group of the operating channel list of the WSO served by the CE, the transmission power limitation, the flag indicating whether or not a channel is shared, the transmission schedule, and the channel classification information included in the ReconfigurationRequest message received from the CM.

In an exemplary embodiment, the PerformReconfigurationResponse primitive received from the WSO may include a failure parameter indicating that reconfiguration has failed, and the ReconfigurationResponse message generated by the CE may include the failure parameter received from the WSO through the PerformReconfigurationResponse primitive.

Another aspect of the present invention provides a method of exchanging messages among a CE, a CM, and a CDIS in a coexistence management system including the CE, the CM, and the CDIS. The method includes: generating, by the CM, a DeregistrationRequest message and sending the DeregistrationRequest message to the CE; waiting for a DeregistrationResponse message from the CE; and sending, by the CM, a message to the CDIS for requesting removal of the CE when the DeregistrationResponse message is received.

In an exemplary embodiment, the method may further include: generating, by the CE having received the DeregistrationRequest message, a PerformDeregistrationRequest primitive, sending the PerformDeregistrationRequest primitive to a WSO served by the CE, and waiting for a PerformDeregistrationResponse primitive from the WSO; and generating, by the CE, the DeregistrationResponse message and sending the DeregistrationResponse message to the CM when the PerformDeregistrationResponse primitive is received from the WSO. The PerformDeregistrationResponse primitive may include information indicating a deregistered state of the WSO.

In an exemplary embodiment, the method may further include, before the generating of the DeregistrationRequest message and sending of the DeregistrationRequest message to the CE by the CM: generating, by the CM, a ReconfigurationRequest message, sending the ReconfigurationRequest message to the CE, and then waiting for a ReconfigurationResponse message from the CE, and the DeregistrationRequest message may be sent to the CE when a failure parameter indicating that reconfiguration has failed is included in the ReconfigurationResponse message received from the CE.

In an exemplary embodiment, the CE having received the DeregistrationRequest message may switch from a management service provided by the CM to an information service.

In an exemplary embodiment, the CE having received the DeregistrationRequest message may subscribe to and register for a management service provided by a new CM.

Still another aspect of the present invention provides a method of exchanging messages between a CE and a CM in a coexistence management system including the CE, the CM, and a CDIS. The method includes: receiving, by the CE, an EventIndication primitive including an event parameter list from a WSO served by the CE; generating, by the CE, an EventIndication message including the event parameter list included in the EventIndication primitive and sending the EventIndication message to the CM; and waiting for an EventConfirm message from the CM.

In an exemplary embodiment, the event parameter list may include at least one of a parameter indicating reaching a signal-to-interference-plus-noise ratio (SINR) threshold and a parameter indicating degradation of quality of service (QoS).

Yet another aspect of the present invention provides a method of exchanging messages between a CE and a CM in a coexistence management system including the CE, the CM, and a CDIS. The method includes: receiving, by the CE, a CoexistenceReportRequest primitive from a WSO served by the CE; generating, by the CE, a CoexistenceReportRequest message and sending the CoexistenceReportRequest message to the CM; waiting for a CoexistenceReportResponse message from the CM; and generating, by the CE, a CoexistenceReportResponse primitive and sending the CoexistenceReportResponse primitive to the WSO when a CoexistenceReportResponse message is received from the CM.

In an exemplary embodiment, the CoexistenceReportResponse message may include coexistence set element information, which includes a neighbor network identifier (ID), network technology information of a neighbor WSO, and a neighbor operating channel number, of the WSO and channel priority information.

Yet another aspect of the present invention provides a method of exchanging messages between CMs in a coexistence management system including CEs, the CMs, and a CDIS. The method includes: generating, by a CM intending to be a slave, a MasterCMRequest message and sending the MasterCMRequest message to at least one candidate CM wanted to be a master; and receiving a MasterCMResponse message from the candidate CM. Accordingly, the CM having sent the MasterCMRequest message is set as a slave, and the candidate CM having sent the MasterCMResponse message is set as a master.

In an exemplary embodiment, the MasterCMRequest message may include a list of CEs managed by the CM intending to be a slave.

In an exemplary embodiment, the method may further include: generating, by the CM set as the master, a MasterSlaveCMConfigurationRequest message and sending the MasterSlaveCMConfigurationRequest message to the slave CM; and waiting for a MasterSlaveCMConfigurationResponse message from the slave CM.

In an exemplary embodiment, the MasterSlaveCMConfigurationRequest message may include a list of CEs managed by the master CM.

In an exemplary embodiment, the method may further include generating, by the slave CM, the MasterSlaveCMConfigurationResponse message and sending the MasterSlaveCMConfigurationResponse message to the master CM, and the MasterSlaveCMConfigurationResponse message may include at least one of an operation code, a CE ID, a network ID of a WSO, network technology information of the WSO, a network type, discovery information of the WSO, a flag indicating whether or not scheduled transmission is supported, an available channel list, a supported channel number list, a WSO operating channel list, resource information required for a WSO operation, and measurement capability information of the WSO, with regard to each of CEs to be registered in the slave CM and managed by the master CM.

In an exemplary embodiment, the available channel list may include at least one of an available channel number, an available start time of the available channel number, an available duration of the available channel number, and constraint information of the available channel number.

In an exemplary embodiment, the required resource information may include at least one of a required bandwidth and an expected occupancy.

Advantageous Effects

Procedures for entities (a coexistence enabler (CE), a coexistence manager (CM), and a coexistence discovery and information server (CDIS)) of a coexistence system, that is, message delivery methods and message parameters, proposed in the present invention enable efficient operation of a coexistence management system for interference avoidance and efficient resource management among a plurality of different types of frequency sharing devices that share a common frequency band.

DESCRIPTION OF DRAWINGS

FIG. 1 is a diagram showing a constitution of a coexistence management system.

FIG. 2 shows a coexistence manager (CM) subscription procedure according to an exemplary embodiment of the present invention.

FIG. 3 shows white space object (WSO) subscription, subscription update, and subscription change procedures according to an exemplary embodiment of the present invention.

FIG. 4 shows WSO registration and registration update procedures according to an exemplary embodiment of the present invention.

FIG. 5 shows a WSO reconfiguration procedure according to an exemplary embodiment of the present invention.

FIG. 6 shows a WSO deregistration procedure according to an exemplary embodiment of the present invention.

FIG. 7 shows a message delivery procedure between a CM and a coexistence enabler (CE) according to an exemplary embodiment of the present invention.

FIG. 8 shows a measurement request procedure, a one-time/scheduled WSO measurement procedure, and an obtaining coexistence report procedure of a CM according to an exemplary embodiment of the present invention.

FIG. 9 shows an inter-CM message delivery procedure according to an exemplary embodiment of the present invention.

FIG. 10 shows a master/slave CM selection procedure according to an exemplary embodiment of the present invention.

FIG. 11 shows a master/slave CM configuration procedure according to an exemplary embodiment of the present invention.

FIG. 12 shows an obtaining coexistence set information procedure according to an exemplary embodiment of the present invention.

FIG. 13 is a block diagram showing a structure of a CM according to an exemplary embodiment of the present invention.

MODES OF THE INVENTION

Since the present invention may be variously modified and have several embodiments, specific embodiments are illustrated in the accompanying drawings and will be described in detail in the descriptions below. However, the present invention is not limited to the specific embodiments and should be construed as including all the changes, equivalents, and substitutions included in the spirit and scope of the present invention.

In describing the present invention, the detailed description of related known technology will be omitted when it may obscure the gist of the present invention.

Singular expressions used herein include plural meanings unless specified otherwise in the context thereof.

Among terms used herein, the terms “module,” “unit,” “interface,” etc., generally denote computer-related objects, for example, hardware, software, or combinations of hardware and software.

FIG. 1 is a diagram showing a constitution of a coexistence management system.

As shown in the drawing, a coexistence management system may include three types of entities, that is, coexistence enablers (CEs) 110 a and 110 b, coexistence managers (CMs) 120 a and 120 b, and a coexistence discovery and information server (CDIS) 130, and a shared channel information database (DB) 140. For convenience of description, FIG. 1 shows two frequency sharing devices and two CEs and two CMs associated with the frequency sharing devices, but those of ordinary skill in the art would appreciate that the present invention is not limited to a constitution including a specific number of CEs and a specific number of CMs.

The CEs 110 a and 110 b are entities that are present in frequency sharing devices 150 a and 150 b and serve as passages between the frequency sharing devices 150 a and 150 b and the CMs 120 a and 120 b. The CEs 110 a and 110 b serve to extract context information (e.g., a wireless access scheme, transmission power, a spectrum sensing threshold value, and a position) associated with the corresponding frequency sharing devices (or the white space objects (WSOs) 150 a and 150 b) requested by the CMs 120 a and 120 b from the WSOs 150 a and 150 b and send the context information to the CMs 120 a and 120 b. Also, the CEs 110 a and 110 b serve to send event information (e.g., changes in the context information of the WSOs 150 a and 150 b) requested by the CMs 120 a and 120 b, and cause the WSOs 150 a and 150 b to reflect on resetting of configurations of the WSOs 150 a and 150 b directed by the CMs 120 a and 120 b.

The CMs 120 a and 120 b are entities that make important decisions associated with frequency sharing, such as operating frequency allocation, transmission power allocation, and transmission time allocation, for improving the efficiency of frequency sharing between the plurality of WSOs 150 a and 150 b. The CMs 120 a and 120 b may collect channel measurement information, etc., through the WSOs 150 a and 150 b.

In addition, when there is a need for cooperation with another CM controlling another frequency sharing device, the CMs 120 a and 120 b may exchange information directly or through the CDIS 130. The CMs 120 a and 120 b may discover neighbor WSOs of the WSOs 150 a and 150 b belonging to the CMs 120 a and 120 b.

The CMs 120 a and 120 b may acquire information on channels that may be used by the WSOs 150 a and 150 b from the channel information DB 140.

The CDIS 130 is an entity for assisting in decision making associated with control of the WSOs 150 a and 150 b. The CDIS 130 acquires necessary information from the plurality of CMs 120 a and 120 b, stores the acquired information, and sends information required by the CMs 120 a and 120 b connected thereto. The CDIS 130 may discover a neighbor frequency sharing device of a WSO belonging to each of the CMs 120 a and 120 b. Also, the CDIS 130 may acquire the information on the channels that may be used by the frequency sharing devices 150 a and 150 b from the channel information DB 140.

The shared channel information DB 140 provides information on channels that may be used by frequency sharing devices.

Specifically, the CMs 120 a and 120 b may provide the WSOs 150 a and 150 b with two types of coexistence services, that is, a management service and an information service. The management service causes the WSOs 150 a and 150 b to reflect on reconfigurations of the WSOs 150 a and 150 b directed by the CMs 120 a and 120 b. The information service delivers information associated with coexistence to the WSOs 150 a and 150 b through the CEs 110 a and 110 b, and enables the WSOs 150 a and 150 b to make important decisions associated with frequency sharing by themselves based on the information.

The CMs 120 a and 120 b may be operated under three types of topologies, that is, autonomous, centralized, and distributed topologies. In the autonomous topology, information for coexistence is exchanged among a plurality of CMs, but a decision associated with coexistence is made by each CM without a negotiation with another CM or help of a master CM. In the centralized topology, a plurality of slave CMs are connected to one master CM, and the slave CMs are controlled by the master CM to solve the coexistence problem of the WSOs 150 a and 150 b. On the other hand, in the distributed topology, the coexistence problem of the WSOs 150 a and 150 b is solved through negotiations between a CM and surrounding CMs. The discovery of a neighbor frequency sharing device (or WSO) that may cause co-channel interference between WSOs is very important for coexistence of WSOs. Such a discovery of a neighbor WSO may be performed by the CMs 120 a and 120 b and/or the CDIS 130. First, a discovery of a neighbor WSO may be classified into the following two types:

-   -   a discovery of neighbor WSOs among WSOs registered in the same         CM (Intra-CM WSO neighbors), and     -   a discovery of neighbor WSOs among WSOs registered in different         CMs (Inter-CM WSO neighbors).

The CDIS 130 may provide the CMs 120 a and 120 b with two types of discovery services according to the following two cases. In a first case, the CDIS 130 provides only an inter-CM discovery service. In this case, the CMs 120 a and 120 b discover only intra-CM neighbor WSOs, and the CDIS 130 discovers inter-CM neighbor WSOs. In a second case, the CDIS 130 provides both the intra-CM and inter-CM discovery services. In this case, both types of neighbor discovery are performed by the CDIS 130 only.

Meanwhile, neighbor CMs denote a case in which neighbor WSOs are registered in different CMs.

An exemplary embodiment of the present invention proposes messages and procedures for message delivery necessary for interaction among respective entities (a CE, a CM, and a CDIS) of the above-described coexistence system. According to a message received by each entity from another entity, each procedure is used for a specific purpose, and CxMessage parameters of messages exchanged between entities are determined.

With reference to FIGS. 2 to 13, messages and related procedures necessary for interaction among entities according to an exemplary embodiment of the present invention will be described below.

CM Subscription

FIG. 2 shows a CM subscription procedure according to an exemplary embodiment of the present invention.

To subscribe to a discovery service provided by a CDIS, a CM may perform a CM subscription procedure. As shown in FIG. 2, the CM generates a SubscriptionRequest message, sends the SubscriptionRequest message to the CDIS, and then waits for a SubscriptionResponse message from the CDIS. Table 1 shows CxMessage parameters of in the SubscriptionRequest message.

TABLE 1 Parameter Data type Value Header CxHeader requestID payload CxPayload subscriptionRequest

Table 2 shows parameters of a subscriptionRequest payload.

TABLE 2 Parameter Data type Description subscribedService SubscribedService This parameter indicates subscribed service type (interCMCoexis- tenceSetElements (inter-CM coexistence discovery) or allCoexis- tenceSetElements (inter-CM and intra-CM coexistence discovery))

When the SubscriptionRequest is received from the CM, the CDIS generates a SubscriptionResponse message and sends the SubscriptionResponse message to the CM. When generating the SubscriptionReponse message, the CDIS sets CxMessage parameters of the SubscriptionResponse message as shown in Table 3.

TABLE 3 Parameter Data type Value header CxHeader requestID payload CxPayload subscriptionResponse

Table 4 shows a parameter of a subscriptionResponse payload.

TABLE 4 Parameter Data type Description status BOOLEAN Status

CM Subscription Update

When a CM intends to change the type of a discovery service provided by a CDIS, the CM may perform a CM subscription update procedure. In this process, the CM generates a SubscriptionRequest message, sends the SubscriptionRequest message to the CDIS, and then waits for a SubscriptionResponse message from the CDIS. CxMessage parameters and payloads of the SubscriptionRequest message and the SubscriptionResponse message are same as those shown in Tables 1 to 4.

FIG. 3 shows WSO subscription, subscription update, and subscription change procedures according to an exemplary embodiment of the present invention. For convenience of description, the respective procedures are sequentially shown in FIG. 3, but those of ordinary skill in the art would appreciate that the procedures are not necessarily performed in the shown sequence.

WSO Subscription

When a request for the start of an operation is received, a CE may perform a WSO subscription procedure to cause a frequency sharing device (WSO) associated with the CE to subscribe to a coexistence service provided by a CM.

First, the CE generates a GetServiceSubscriptionRequest primitive, sends the GetServiceSubscriptionRequest primitive to the WSO served by the CE, and then waits for a GetServiceSubscriptionResponse primitive from the WSO.

Table 5 shows parameters of a GetServiceSubscriptionResponse primitive. For example, a GetServiceSubscriptionResponse primitive may include the parameter “subscribedService” indicating whether a subscribed service type is a management service or an information service.

TABLE 5 Parameter Data type Description subscribedService SubscribedService Coexistence service (management or information service) to which WSO subscribes status CxMediaStatus Status

After receiving a GetServiceSubscriptionResponse primitive from the WSO, the CE generates a SubscriptionRequest message, sends the SubscriptionRequest message to the CM, and then waits for a SubscriptionResponse message from the CM.

Here, CxMessage parameters and a subscriptionRequest payload of the SubscriptionRequest message are shown in Tables 6 and 7, respectively. As shown in Table 7, the payload of the SubscriptionRequest message may include the subscribedService parameter received through the GetServiceSubscriptionResponse primitive received from the WSO.

TABLE 6 Parameter Data type Value header CxHeader requestID payload CxPayload subscriptionRequest

TABLE 7 Parameter Data type Description subscribedService SubscribedService SubscribedService parameter received through GetServiceSub- scriptionResponse primitive

When the SubscriptionRequest message is received, the CM generates the SubscriptionResponse message and sends the SubscriptionResponse message to the CE.

In an exemplary embodiment, CxMessage parameters of the SubscriptionResponse message are as shown in Table 8, and a subscriptionResponse payload is as shown in Table 9.

TABLE 8 Parameter Data type Value header CxHeader requestID payload CxPayload subscriptionResponse

TABLE 9 Parameter Data type Description status CxMediaStatus Status

Next, after receiving the SubscriptionResponse message from the CM, the CE may generate a GetServiceSubscriptionConfirm primitive and send the GetServiceSubscriptionConfirm primitive to the WSO.

A parameter of the GetServiceSubscriptionConfirm primitive is shown in Table 10. As shown in Table 10, the GetServiceSubscriptionConfirm primitive indicates whether or not subscription was successful.

TABLE 10 Parameter Data type Description status CxMediaStatus Indication of whether or not subscription was successful or not

WSO Subscription Update

When new WSO subscription information, indicating that a change of a coexistence service provided by a coexistence system is wanted, is received from the WSO, the CE may perform a WSO subscription update procedure for a subscription update of the coexistence service.

In an exemplary embodiment, when a NewServiceSubscriptionIndication primitive is received from the WSO, the CE generates a SubscriptionRequest message, sends the SubscriptionRequest message to the CM serving the CE, and waits for a SubscriptionResponse message from the CM.

In an exemplary embodiment, the NewServiceSubscriptionIndication primitive may include a subscribed service type parameter as shown in a table below.

TABLE 11 Parameter Data type Description subscribedService SubscribedService Coexistence service (management or information service) to which WSO subscribes

When generating the SubscriptionRequest message, the CE sets CxMessage parameters of the SubscriptionRequest message as shown in Table 12 below, and a value indicating a subscribed service type included in the NewServiceSubscriptionIndication primitive received from the WSO may be included as a SubscribedService payload.

TABLE 12 Parameter Data type Value header CxHeader requestID payload CxPayload subscriptionRequest

TABLE 13 Parameter Data type Description subscribedService SubscribedService SubscribedService parameter received through NewServiceSub- scriptionIndication primitive

After receiving the SubscriptionRequest message from the CE, the CM generates a SubscriptionResponse message and sends the SubscriptionResponse message to the CE.

In an exemplary embodiment, CxMessage parameters and a payload of the SubscriptionResponse message are as shown in Tables 14 and 15.

TABLE 14 Parameter Data type Value header CxHeader requestID payload CxPayload subscriptionResponse

TABLE 15 Parameter Data type Description status CxMediaStatus Status

After receiving the SubscriptionResponse message from the CM, the CE generates a GetServiceSubscriptionConfirm primitive and sends the GetServiceSubscriptionConfirm primitive to the WSO. In an exemplary embodiment, a parameter of the GetServiceSubscriptionConfirm primitive is as shown below.

TABLE 16 Parameter Data type Description status CxMediaStatus Indication of whether the subscription was successful or not

WSO Subscription Change

When the CM intends to request a change of the type of a coexistence service provided by the CM from the WSO, the CM may perform a WSO subscription change procedure.

The CM may perform the procedure when it is determined that the WSO is not suitable for the current coexistence service (information or management service). When the CM performs the procedure, the WSO should change its coexistence service from the current coexistence service to the other service.

First, the CM generates a SubscriptionChangeRequest message, sends the SubscriptionChangeRequest message to the CE, and then waits for a SubscriptionChangeResponse message.

In an exemplary embodiment, CxMessage parameters and a payload of the SubscriptionChangeRequest message are shown in Tables 17 and 18 below.

TABLE 17 Parameter Data type Value header CxHeader requestID payload CxPayload subscriptionChangeRequest

TABLE 18 Parameter Data type Description newSubscribedService SubscribedService Proposed new subscribed coexistence service (management or information)

After receiving the SubscriptionChangeRequest message from the CM, the CE generates a ChangeSubscriptionRequest primitive, sends the ChangeSubscriptionRequest primitive to the WSO, and waits for a ChangeSubscriptionResponse primitive from the WSO.

In an exemplary embodiment, a parameter of the ChangeSubscriptionResponse primitive is as shown Table 19.

TABLE 19 Parameter Data type Description newSubscribedService SubscribedService SubscribedService parameter received through SubscriptionChangeRequest message

After receiving a ChangeSubscriptionResponse primitive from the WSO, the CE generates a SubscriptionChangeResponse message and sends the SubscriptionChangeResponse message to the CM.

In an exemplary embodiment, a parameter of the ChangeSubscriptionResponse primitive is shown in Table 20, and CxMessage parameters of the SubscriptionChangeResponse message generated by the CE and a parameter in a subscriptionChangeResponse payload are as shown in Tables 21 and 22, respectively.

TABLE 20 Parameter Data type Description status CxMediaStatus Indication of whether or not CE has accepted subscription change request

TABLE 21 Parameter Data type Value header CxHeader requestID payload CxPayload subscriptionChangeResponse

TABLE 22 Parameter Data type Description status CxMediaStatus Status

FIG. 4 shows WSO registration and registration update procedures according to an exemplary embodiment of the present invention.

WSO Registration

When a WSO subscription procedure is successfully completed, a CE and a CM perform a WSO registration procedure to register the WSO in the CM and a CDIS.

First, after successfully finishing the WSO subscription procedure, the CE generates a GetRegInfoRequest primitive, sends the GetRegInfoRequest primitive to the WSO, and waits for a GetRegInfoResponse primitive from the WSO.

In an exemplary embodiment, parameters of the GetRegInfoRequest primitive are as shown in Table 23 below.

TABLE 23 Parameter Data type Description networkID OCTET STRING Identifier of network which the WSO represents. For example, in case of Institute of Electrical and Electronics Engineers (IEEE) 802.11, this parameter contains basic service set ID (BSSID) used by WSO. networkTechnology NetworkTechnology Indication of wireless radio access technology used by WSO networkType NetworkType Indication of network type specified in regulations discoveryInformation DiscoveryInformation Discovery information of WSO txScheduleSupported BOOLEAN Indication of whether or not scheduled transmission is supported listOfAvailableChNumbers ListOfAvailableChNumbers Information about available white space channels(see table below) listOfSupportedChNumbers SEQUENCE OF INTEGER List of Supported channel numbers listOfOperatingChNumbers ListOfOperatingChNumbers WSO operating channel numbers requiredResource RequiredResource Resources required for WSO operation measurementCapability MeasurementCapability Measurement capability of WSO (energy detection or failure detection) mobilityInformation MobilityInformation WSO mobility information

Table 24 shows data types of each element of the sequence in the listOfAvailableChNumbers parameter.

TABLE 24 Parameter Data type Description channelNumber INTEGER Available channel number availableStartTime GeneralizedTime Available start time of available channel number if applicable availableDuration REAL Available duration of available channel number if applicable constOfChUses ConstOfChUses Constraints (this parameter is not used when there is no constraint)

Table 25 shows data types of respective elements of a sequence in the listOfOperatingChNumbers parameter among the above parameters.

TABLE 25 Parameter Data type Description ChannelNumber INTEGER Operating channel number occupancy REAL This parameter is not used when occupancy is not known, and indicates value of occupancy (from 0 to 1) when occupancy is known.

Table 26 shows data types of the requiredResource parameter among the above parameters.

TABLE 26 Data Parameter type Description requiredBandwidth REAL Required Bandwidth for WSO operation occupancy REAL Expected occupancy (this parameter is not used when expected occupancy is not known, and indicates value of expected occupancy (from 0 to 1) when expected occupancy is known)

Table 27 shows data types of the mobilityInformation parameter.

TABLE 27 Parameter Data type Description maxSpeed REAL This parameter optionally exists. This parameter is set to indicate maximum speed value (km/h) of WSO. speedInformation SpeedInformation This parameter optionally exists. This parameter is set to indicate detailed information on speed and direction of WSO. routeInformation RouteInformation This parameter optionally exists. This parameter is set to indicate planned route and time of WSO.

After receiving a GetRegInfoResponse primitive from the WSO, the CE generates a CERegistrationRequest message, sends the CERegistrationRequest message to the CM serving the CE, and waits for a RegistrationResponse message from the CM.

In an exemplary embodiment, CxMessage parameters and the payload structure of the CERegistrationRequest message are as shown in Tables 28 and 29, respectively.

TABLE 28 Parameter Data type Value header CxHeader requestID payload CxPayload ceRegistrationRequest

TABLE 29 Parameter Data type Description operationCode OperationCode Operation code (new) networkID OCTET STRING Identifier of network which the WSO represents. For example, in case of IEEE 802.11, this parameter contains BSSID used by WSO.. networkTechnology NetworkTechnology Indication of wireless radio access technology used by WSO networkType NetworkType Indication of network type specified in regulations discoveryInformation DiscoveryInformation Discovery information of WSO txScheduleSupported BOOLEAN Indication of whether or not scheduled transmission is supported listOfAvailableChNumbers ListOfAvailableChNumbers Information on available channels, available channel information listOfSupportedChNumbers SEQUENCE OF INTEGER Supported channel numbers listOfOperatingChNumbers ListOfOperatingChNumbers WSO operating channel numbers requiredResource RequiredResource Resources required for WSO operation measurementCapability MeasurementCapability Measurement capability of WSO (energy detection or failure detection) mobilityInformation MobilityInformation WSO mobility information

In an exemplary embodiment, CxMessage parameters of a RegistrationResponse message are as shown in Table 30.

TABLE 30 Parameter Data type Value header CxHeader requestID payload CxPayload registrationResponse

After receiving a RegistrationResponse message from the CM, the CE generates a GetRegInfoConfirm primitive and sends the GetRegInfoConfirm primitive to the WSO.

In an exemplary embodiment, a parameter of the GetRegInfoConfirm primitive is as shown below.

TABLE 31 Parameter Data type Description status CxMediaStatus Indication of whether or not registration was successful or not

Meanwhile, after sending the RegistrationResponse message to the CE, the CM generates a CMRegistrationRequest message, sends the CMRegistrationRequest message to the CDIS serving the CM, and waits for a RegistrationResponse message from the CDIS.

In an exemplary embodiment, CxMessage parameters and payloads of the CMRegistrationRequest message are as shown in Tables 32 and 33, respectively.

TABLE 32 Parameter Data type Value header CxHeader requestID payload CxPayload cmRegistrationRequest

TABLE 33 Parameter Data type Description operationCode OperationCode Operation code (new) ceID CxID CE ID networkID OCTET STRING Network ID of WSO. For example, in case of IEEE 802.11, this parameter indicates BSSID used by WSO. networkTechnology NetworkTechnology Indication of wireless radio access technology used by WSO networkType NetworkType Indication of network type specified in regulations discovery- DiscoveryInformation Discovery information of Information WSO listOfSupportedCh- SEQUENCE OF List of supported channel Numbers INTEGER numbers

In an exemplary embodiment, CxMessage parameters of the RegistrationResponse message generated by the CDIS are as shown in Table 34.

TABLE 34 Parameter Data type Value header CxHeader requestID payload CxPayload RegistrationResponse

WSO Registration Update

When the CE receives new WSO registration information, the CE and the CM may perform a WSO registration update procedure to update the registration information of the WSO.

First, when a NewRegInfoIndication primitive is received from the WSO, the CE generates a CERegistrationRequest message, sends the CERegistrationRequest message to the CM, and waits for a RegistrationResponse message from the CM.

In an exemplary embodiment, parameters of the NewRegInfoIndication primitive are as shown in a table below.

TABLE 35 Parameter Data type Description operationCode OperationCode Operation code (modify) networkID OCTET STRING Network ID of WSO. For example, in case of IEEE 802.11, this parameter indicates BSSID used by WSO. networkTechnology NetworkTechnology Indication of wireless radio access technology used by WSO networkType NetworkType Indication of network type specified in regulations discoveryInformation DiscoveryInformation Discovery information of WSO txScheduleSupported BOOLEAN Indication of whether or not scheduled transmission is supported listOfAvailableChNumbers ListOfAvailableChNumbers Information on available white space channels, available channel number list listOfSupportedChNumbers SEQUENCE OF INTEGER List of supported channel numbers listOfOperatingChNumbers ListOfOperatingChNumbers List of WSO operating channel numbers requiredResource RequiredResource Resources required for WSO operation measurementCapability MeasurementCapability Measurement capability of WSO (energy detection or failure detection) mobilityInformation MobilityInformation WSO mobility information

In an exemplary embodiment, CxMessage parameters of a RegistrationResponse message are as shown below.

TABLE 36 Parameter Data type Value header CxHeader requestID payload CxPayload RegistrationResponse

After receiving a RegistrationResponse message from the CM, the CE generates a NewRegInfoConfirm primitive and sends the NewRegInfoConfirm primitive to the WSO.

In an exemplary embodiment, a parameter of the NewRegInfoConfirm primitive is as shown below.

TABLE 37 Parameter Data type Description status CxMediaStatus Indication of whether or not registration was successful

Meanwhile, after sending the RegistrationResponse message to the CE, the CM generates a CMRegistrationRequest message, sends the CMRegistrationRequest message to the CDIS, and waits for a RegistrationResponse message from the CDIS.

In an exemplary embodiment, CxMessage parameters and payloads of the CMRegistrationRequest message are as shown in Tables 38 and 39, respectively.

TABLE 38 Parameter Data type Value header CxHeader requestID payload CxPayload cmRegistrationRequest

TABLE 39 Parameter Data type Description operationCode OperationCode Operation code (new, modify, remove) ceID CxID CE ID networkID OCTET STRING Network ID of WSO. For example, in case of IEEE 802.11, this parameter indicates BSSID used by WSO. networkTechnology NetworkTechnology Indication of wireless radio access technology used by WSO networkType NetworkType Indication of network type specified in regulations discovery- DiscoveryInformation Discovery information of Information WSO listOfSupportedCh- SEQUENCE OF List of supported channel Numbers INTEGER numbers

In an exemplary embodiment, CxMessage parameters of a RegistrationResponse message received from the CDIS are as shown in a table below.

TABLE 40 Parameter Data type Value header CxHeader requestID payload CxPayload RegistrationResponse

WSO Reconfiguration for Management Service

When reconfiguration is necessary for at least one WSO that subscribes to a management service provided by a CM and is under management as the CM performs a new coexistence decision making, the CM and a CE may perform a WSO reconfiguration procedure. FIG. 5 shows a WSO reconfiguration procedure according to an exemplary embodiment of the present invention.

First, the CM generates a ReconfigurationRequest message, sends the ReconfigurationRequest message to a CE that provides service to the WSO requiring reconfiguration, and then waits for a ReconfigurationResponse message from the CE. In an exemplary embodiment, the number of ReconfigurationRequest messages equals the number of WSOs requiring reconfiguration.

In an exemplary embodiment, CxMessage parameters and payloads of the ReconfigurationRequest message are as shown in Tables 41 and 42, respectively.

TABLE 41 Parameter Data type Value header CxHeader requestID payload CxPayload reconfigurationRequest

TABLE 42 Parameter Data type Description OperatingChNumbers SEQUENCE OF Operating channel INTEGER list of WSO txPowerLimit REAL Transmission power limitation channelIsShared BOOLEAN Indication of whether or not channel is shared. True when frequency is shared with another WSO, and false otherwise. txSchedule txSchedule Transmission schedule chClassInfo ChClassInfo Channel classification information

A table below shows data types of the chClassInfo parameter.

TABLE 43 Parameter Data type Description availableChannelList SEQUENCE OF INTEGER Available channel list restrictedChannelList SEQUENCE OF INTEGER Restricted channel list protectedChannelList SEQUENCE OF INTEGER Protected channel list unclassifiedChannelList SEQUENCE OF INTEGER Unclassified channel list operatingChannelList SEQUENCE OF Operating channel OperatingChannelInfo list coexistenceChannelList SEQUENCE OF Coexistence OperatingChannelInfo channel list

After receiving the ReconfigurationRequest message from the CM, the CE generates a PerformReconfigurationRequest primitive, sends the PerformReconfigurationRequest primitive to the WSO, and waits for a PerformReconfigurationResponse primitive from the WSO.

A table below shows parameters of the PerformReconfigurationRequest primitive.

TABLE 44 Parameter Data type Description listOfOperatingCh- SEQUENCE Operating channel list received Number OF through ReconfigurationRequest INTEGER message txPowerLimit REAL Transmission power limitation received through ReconfigurationRequest message channelIsShared BOOLEAN Shared channel list received through ReconfigurationRequest message txSchedule txSchedule Transmission schedule received through ReconfigurationRequest message

After receiving a PerformReconfigurationResponse primitive from the WSO, the CE generates a ReconfigurationResponse message and sends the ReconfigurationResponse message to the CM.

In an exemplary embodiment, parameters of the PerformReconfigurationResponse primitive from the WSO are as shown in a table below.

TABLE 45 Parameter Data type Description status BOOLEAN Reconfiguration parameter Failed Failed Failure parameter (information indicating that parameters parameters reconfiguration has failed)

In an exemplary embodiment, data types of CxMessage parameters and parameters of payloads of a ReconfigurationResponse message generated by the CE are as shown in Tables 46 and 47 below, respectively.

TABLE 46 Parameter Data type Value header CxHeader requestID payload CxPayload reconfigurationResponse

TABLE 47 Parameter Data type Description status BOOLEAN Reconfiguration parameter received through PerformReconfigurationResponse primitive Failed Failed Failure parameter received through parameters parameters PerformReconfigurationResponse primitive

WSO Deregistration

FIG. 6 shows a WSO deregistration procedure according to an exemplary embodiment of the present invention.

To deregister a WSO/CE that has subscribed to a management service but does not accept a reconfiguration request of a CM from the CM, the CM and the CE may perform a WSO deregistration procedure. When the CM performs this procedure, the WSO/CE should select and perform one of the following:

-   -   Switch from a management service to an information service     -   Subscription to and registration for a management service         provided by a new CM

As shown in FIG. 6, the CM first generates a DeregistrationRequest message, sends the DeregistrationRequest message to the CE, and then waits for a DeregistrationResponse message from the CE.

In an exemplary embodiment, CxMessage parameters of the DeregistrationRequest message are as shown below.

TABLE 48 Parameter Data type Value header CxHeader requestID payload CxPayload deregistrationRequest

After receiving the DeregistrationRequest message from the CM, the CE generates a PerformDeregistrationRequest primitive, sends the PerformDeregistrationRequest primitive to the WSO, and waits for a PerformDeregistrationResponse primitive from the WSO.

In an exemplary embodiment, parameters of the PerformDeregistrationRequest primitive and a PerformDeregistrationResponse primitive are as shown in Tables 49 and 50, respectively.

TABLE 49 Parameter Data type Description wsoDeregistration BOOLEAN TRUE

TABLE 50 Parameter Data type Description status BOOLEAN status

After receiving a PerformDeregistrationResponse primitive from the WSO, the CE generates a DeregistrationResponse message and sends the DeregistrationResponse message to the CM.

In an exemplary embodiment, CxMessage parameters and a payload of the DeregistrationResponse message are as shown in Tables 51 and 52, respectively.

TABLE 51 Parameter Data type Value header CxHeader requestID payload CxPayload deregistrationResponse

TABLE 52 Parameter Data type Description status CxMediaStatus status

After receiving the DeregistrationResponse message from the CE, the CM generates a CMRregistrationRequest message, sends the CMRregistrationRequest message to a CDIS serving the CM, and waits for a RegistrationResponse message from the CDIS.

In an exemplary embodiment, CxMessage parameters and payloads of the CMRegistrationRequest message are as shown in Tables 53 and 54 below, respectively. As shown in Table 54, an operation code included in a payload of the message may be indicated as “removal.”

TABLE 53 Parameter Data type Value header CxHeader requestID payload CxPayload CMRegistrationRequest

TABLE 54 Parameter Data type Description operationCode OperationCode Operation code (“removal” is selected) ceID CxID CE ID networkID OCTET STRING Not used networkTechnology NetworkTechnology Not used networkType NetworkType Not used discoveryInformation DiscoveryInformation Not used listOfSupportedChNumbers SEQUENCE OF Not used INTEGER

CxMessage parameters of a RegistrationResponse message received from the CDIS are as shown in a table below.

TABLE 55 Parameter Data type Value header CxHeader requestID payload CxPayload RegistrationResponse

FIG. 7 shows a message delivery procedure between a CM and a CE according to an exemplary embodiment of the present invention, and more specifically, an event indication procedure, an obtaining available channel list procedure, a channel classification request procedure, and a channel classification update procedure in sequence. For convenience of description, the procedures are sequentially shown in FIG. 7, but those of ordinary skill in the art would appreciate that the procedures are not necessarily performed in the shown sequence.

Event Indication to CM

To notify a CM of the occurrence of an event, a CE may perform a procedure of sending an event indication from the CE to the CM.

After receiving an EventIndication primitive from a WSO, the CE generates an EventIndication message, sends the EventIndication message to a CM serving the CE, and waits for an EventConfirm message from the CM.

In an exemplary embodiment, a parameter of the EventIndication primitive is as shown in Table 56.

TABLE 56 Parameter Data type Description eventParams EventParams Event parameter list

When the CE generates the EventIndication message, CxMessage parameters of the EventIndication message are set as shown in a table below.

TABLE 57 Parameter Data type Value header CxHeader requestID payload CxPayload eventIndication

A parameter of an eventIndication payload is as shown in a table below.

TABLE 58 Parameter Data type Description eventParams EventParams Event parameter list (a signal-to-interference- plus-noise ratio (SINR) threshold reached or quality of service (QoS)) degradation received through EventIndication primitive

After receiving the EventIndication message from the CE, the CM generates an EventConfirm message and sends the EventConfirm message to the CE.

In an exemplary embodiment, CxMessage parameters of the EventConfirm message are as shown below.

TABLE 59 Parameter Data type Value header CxHeader requestID payload CxPayload eventConfirm

Obtaining Available Channel List from WSO

In order for the CM to obtain available channel list information from the WSO, the CM and the CE may perform a procedure of obtaining an available channel list from the WSO.

The CM generates an AvailableChannelsRequest message, sends the AvailableChannelsRequest message to the CE serving the WSO, and then waits for an AvailableChannelsResponse message from the CE.

In an exemplary embodiment, CxMessage parameters of the AvailableChannelsRequest message are as shown below.

TABLE 60 Parameter Data type Value header CxHeader requestID payload CxPayload availableChannelsRequest

After receiving the AvailableChannelsRequest message from the CM, the CE generates an AvailableChannelsListRequest primitive, sends the AvailableChannelsListRequest primitive to the WSO, and waits for an AvailableChannelsListResponse primitive from the WSO.

In an exemplary embodiment, a parameter of an AvailableChannelsListResponse primitive is as shown below.

TABLE 61 Parameter Data type Description listOfAvailableChNumbers ListOfAvailableChNumbers Available channel list of shared channel DB

After receiving an AvailableChannelsListResponse primitive from the WSO, the CE generates an AvailableChannelsResponse message and sends the AvailableChannelsResponse message to the CM.

In an exemplary embodiment, CxMessage parameters and a payload of the AvailableChannelsResponse message are set as shown in Tables 62 and 63 below.

TABLE 62 Parameter Data type Value header CxHeader requestID payload CxPayload availableChannelsResponse

TABLE 63 Parameter Data type Description listOfAvail- ListOfAvail- Available channel number ableChNumbers ableChNumbers list received through AvailableChannelsListRe- sponse primitive

Data types of respective elements of a sequence in the listOfAvailableChNumbers parameter are as shown below.

TABLE 64 Parameter Data type Description channelNumber INTEGER Available channel number availableStartTime GeneralizedTime Available start time of available channel number availableDuration REAL Available duration of available channel number constOfChUses ConstOfChUses Constraints (this parameter is not used when there is no constraint)

Channel Classification Request by CE

When the WSO needs to obtain channel classification information from the CM through the CE, the CE/CM may perform an obtaining channel classification information procedure to provide channel classification information to the WSO.

First, when a ChannelClassificationRequest primitive is received from the WSO, the CE generates a ChannelClassificationRequest message, sends the ChannelClassificationRequest message to the CM, and waits for a ChannelClassificationResponse message from the CM.

In an exemplary embodiment, a parameter of the ChannelClassificationRequest primitive is as shown below.

TABLE 65 Parameter Data type Description listOfNetworkID SEQUENCE OF OCTET STRING Network ID list

In an exemplary embodiment, CxMessage parameters and a payload of the ChannelClassificationRequest message are as shown in Tables 66 and 67, respectively.

TABLE 66 Parameter Data type Value header CxHeader requestID payload CxPayload channelClassificationRequest

TABLE 67 Parameter Data type Description listOfNetworkID SEQUENCE OF Network ID list OCTET STRING received through ChannelClassifi- cationRequest primitive

In an exemplary embodiment, CxMessage parameters and payloads of a ChannelClassificationResponse message are as shown in Tables 68 and 69, respectively.

TABLE 68 Parameter Data type Value header CxHeader requestID payload CxPayload channelClassificationResponse

TABLE 69 Parameter Data type Description networkID OCTET STRING Network ID chClassInfo ChClassInfo Channel classification information

In an exemplary embodiment, data elements shown in a table below may be included in the chClassInfo parameter.

TABLE 70 Parameter Data type Description availableChannelList SEQUENCE OF Available channel INTEGER list restrictedChannelList SEQUENCE OF Restricted channel INTEGER list protectedChannelList SEQUENCE OF Protected channel INTEGER list unclassifiedChannelList SEQUENCE OF Unclassified channel INTEGER list operatingChannelList SEQUENCE OF Operating channel OperatingChannelInfo list coexistenceChannelList SEQUENCE OF Coexistence channel OperatingChannelInfo list

After receiving a ChannelClassificationResponse message from the CM, the CE generates a ChannelClassificationResponse primitive and sends the ChannelClassificationResponse primitive to the WSO.

In an exemplary embodiment, a parameter of the ChannelClassificationResponse primitive is as shown below.

TABLE 71 Parameter Data type Description chClassInfoList ChClassInfoList Channel classification information received through ChannelClassifi- cationResponse primitive

In the chClassInfo parameter, data elements shown in a table below may be included.

TABLE 72 Parameter Data type Description networkID OCTET STRING Network ID chClassInfo ChClassInfo Channel classification information

Channel Classification Update to CE

When channel classification information of the CM is updated, the CM may perform a procedure of announcing channel classification information update to the CE to provide channel classification update information to the WSO. When the channel classification information is updated, the CM generates a ChannelClassificationAnnouncement message and sends the ChannelClassificationAnnouncement message to the CE.

In an exemplary embodiment, CxMessage parameters of the ChannelClassificationAnnouncement message and data types of parameters in payloads are as shown in Tables 73 and 74, respectively.

TABLE 73 Parameter Data type Value header CxHeader requestID payload CxPayload channelClassificationAnnouncement

TABLE 74 Parameter Data type Description networkID OCTET STRING Network ID chClassInfo ChClassInfo Channel classification information

After receiving the ChannelClassificationAnnouncement message from the CM, the CE generates a ChannelClassificationIndication primitive and sends the ChannelClassificationIndication primitive to the WSO.

In an exemplary embodiment, a parameter of the ChannelClassificationAnnouncement primitive is as shown in Table 75.

TABLE 75 Parameter Data type Description chClassInfoList ChClassInfoList Channel classification information received through ChannelClassifi- cationAnnouncement message

In an exemplary embodiment, the chClassInfoList parameter may include data shown below.

TABLE 76 Parameter Data type Description networkID OCTET STRING Network ID chClassInfo ChClassInfo Channel classification information

FIG. 8 shows a measurement request procedure, a one-time/scheduled WSO measurement procedure, and an obtaining coexistence report procedure of a CM according to an exemplary embodiment of the present invention. For convenience of description, the procedures are sequentially shown in FIG. 8, but those of ordinary skill in the art would appreciate that the procedures are not necessarily performed in the shown sequence.

Measurement Request

The CM may request that the WSO indicated by a CE served by the CM perform a measurement, and then perform a measurement request procedure of requesting the provision of a measurement report from the CE. The CM may request that the WSO perform a measurement and provide a measurement report to the CE once per request or based on a schedule.

First, the CM generates a MeasurementRequest message, sends the MeasurementRequest message to the CE, and then waits for a MeasurementConfirm message from the CE.

In an exemplary embodiment, CxMessage parameters of the MeasurementRequest message and a parameter of a measurementRequest payload are as shown in Tables 77 and 78, respectively.

TABLE 77 Parameter Data type Value header CxHeader requestID payload CxPayload measurementRequest

TABLE 78 Parameter Data type Description MeasurementDescrip- MeasurementDescrip- Measurement descrip- tion tion tion

In an exemplary embodiment, CxMessage parameters of a MeasurementConfirm message are as shown below.

TABLE 79 Parameter Data type Value header CxHeader requestID payload CxPayload measurementConfirm

After receiving the MeasurementRequest message from the CM, the CE generates a GetMeasurementRequest primitive and sends the GetMeasurementRequest primitive to the WSO while generating a MeasurementConfirm message and sending the MeasurementConfirm message to the CM.

In an exemplary embodiment, the GetMeasurementRequest primitive is as shown below.

TABLE 80 Parameter Data type Description MeasurementDescrip- MeasurementDescrip- Measurement descrip- tion tion tion received through MeasurementRequest message

One-Time Measurement

To provide a one-time measurement result of the WSO to the CM, the CE may perform an obtaining one-time measurement procedure.

After receiving a GetMeasurementResponse primitive from the WSO, the CE generates a measurementResponse message, sends the measurementResponse message to the CM, and waits for a measurementConfirm message from the CM.

In an exemplary embodiment, the GetMeasurementResponse primitive is as shown below.

TABLE 81 Parameter Data type Description measurementResult MeasurementResult Measurement result

In an exemplary embodiment, CxMessage parameters and a payload of the measurementResponse message sent from the CE to the CM are as shown in Tables 82 and 83, respectively.

TABLE 82 Parameter Data type Value header CxHeader requestID payload CxPayload measurementResponse

TABLE 83 Parameter Data type Description measurementResult MeasurementResult Measurement result received through GetMeasurementRe- sponse primitive

After receiving the measurementResponse message from the CE, the CM generates a measurementConfirm message and sends the measurementConfirm message to the CE.

TABLE 84 Parameter Data type Value header CxHeader requestID payload CxPayload measurementResponse

TABLE 85 Parameter Data type Description measurementResult MeasurementResult Measurement result received through GetMeasurementRe- sponse primitive

In an exemplary embodiment, CxMessage parameters of the measurementConfirm message are as shown below.

TABLE 86 Parameter Data type Value header CxHeader requestID payload CxPayload measurementConfirm

Scheduled Measurement

To provide a scheduled measurement result of the WSO to the CM, the CE may perform an obtaining scheduled measurement procedure.

After receiving a GetMeasurementResponse primitive from the WSO, the CE generates a measurementResponse message and sends the measurementResponse message to the CM.

In an exemplary embodiment, the GetMeasurementResponse primitive is as shown below.

TABLE 87 Parameter Data type Description measurementResult MeasurementResult Measurement result

In an exemplary embodiment, CxMessage parameters and a payload of the measurementResponse message sent from the CE to the CM are as shown in Tables 88 and 89, respectively.

TABLE 88 Parameter Data type Value header CxHeader requestID payload CxPayload measurementResponse

TABLE 89 Parameter Data type Description measurementResult MeasurementResult Measurement result received through GetMeasurementRe- sponse primitive

After receiving the measurementResponse message from the CE, the CM generates a measurementConfirm message and sends the measurementConfirm message to the CE.

In an exemplary embodiment, CxMessage parameters of the measurementConfirm message are as shown below.

TABLE 90 Parameter Data type Value header CxHeader requestID payload CxPayload measurementConfirm

Coexistence Report: Information Service

When the WSO intends to obtain a coexistence report from the CM, the CE and the CM may perform an obtaining coexistence report procedure to provide coexistence information to the WSO.

After receiving a CoexistenceReportRequest primitive from the WSO, the CE generates a CoexistenceReportRequest message, sends the CoexistenceReportRequest message to the CM, and waits for a CoexistenceReportResponse message from the CM.

In an exemplary embodiment, CxMessage parameters of the CoexistenceReportRequest message are as shown below.

TABLE 91 Parameter Data type Value header CxHeader requestID payload CxPayload coexistenceReportRequest

In an exemplary embodiment, CxMessage parameters and payloads of a CoexistenceReportResponse message are as shown in Tables 92 and 93, respectively.

TABLE 92 Parameter Data type Value header CxHeader requestID payload CxPayload coexistenceReportResponse

TABLE 93 Parameter Data type Description coexistenceReport CoexistenceReport Information on coexistence set elements of WSO in form of coexistence report channelPriority ChannelPriority Channel priority

The parameters of the CoexistenceReport payload may include data types shown in Table 94 below.

TABLE 94 Parameter Data type Description networkID OCTET STRING Neighbor network ID networkTechnology NetworkTechnology Neighbor WSO network technology listOfOper- ListOfOper- Neighbor operating atingChNumbers atingChNumbers channel numbers

A table below shows the data type of each element of the sequence in the ChannelPriority parameter.

TABLE 95 Parameter Data type Value channelNumber INTEGER Channel number Priority INTEGER Channel priority order

After receiving a CoexistenceReportResponse message from the CM, the CE may generate a CoexistenceReportResponse primitive and send the CoexistenceReportResponse primitive to the WSO.

In an exemplary embodiment, parameters of the CoexistenceReportResponse primitive are as shown in a table below.

TABLE 96 Parameter Data type Description coexistenceReport CoexistenceReport Coexistence report information received through Coexis- tenceReportResponse message channelPriority ChannelPriority Channel priority received through CoexistenceReportRe- sponse message

FIG. 9 shows an inter-CM message delivery procedure according to an exemplary embodiment of the present invention, and more specifically, an event indication procedure, a channel classification request procedure, a channel classification update procedure, an obtaining information procedure, a negotiation procedure, and a reconfiguration request procedure. For convenience of description, the procedures are sequentially shown in FIG. 9, but those of ordinary skill in the art would appreciate that the procedures are not necessarily performed in the shown sequence.

Event Indication to Another CM

A CM may perform a procedure of sending an event indication from the CM to another CM to notify the other CM of an event associated with a coexistence system.

First, the CM generates an EventIndication message, sends the EventIndication message to the other CM, and then waits for an EventConfirm message from the other CM.

In an exemplary embodiment, CxMessage parameters and a payload of the EventIndication message are as shown in Tables 97 and 98, respectively.

TABLE 97 Parameter Data type Value header CxHeader requestID payload CxPayload eventIndication

TABLE 98 Parameter Data type Description eventParams EventParams Event list (SINR threshold reached or QoS degradation)

After receiving the EventIndication message from the CM, the other CM generates an EventConfirm message and sends the EventConfirm message to the CM that has sent the eventIndication message.

Channel Classification Request by CM

To obtain the channel classification information of the other CM, the CM may perform an obtaining channel classification information procedure.

First, the CM generates a CMChannelClassificationRequest message, sends the CMChannelClassificationRequest message to the other CM, and then waits for a CMChannelClassificationResponse message from the other CM.

In an exemplary embodiment, CxMessage parameters and a payload of the CMChannelClassificationRequest message are as shown in Tables 99 and 100, respectively.

TABLE 99 Parameter Data type Value header CxHeader requestID payload CxPayload cmChannelClassificationRequest

TABLE 100 Parameter Data type Description listOfNetworkID SEQUENCE OF OCTET STRING Network ID list

A table below shows CxMessage parameters of a CMChannelClassificationResponse message.

TABLE 101 Parameter Data type Value header CxHeader requestID payload CxPayload cmChannelClassificationResponse

A table below shows parameters of a cmChannelClassificationResponse payload.

TABLE 102 Parameter Data type Description networkID OCTET STRING Network ID chClassInfo ChClassInfo Channel classification information

Channel Classification Update to Another CM

To provide updated channel classification information to the other CM, the CM may perform a procedure of announcing channel classification information update to the other CM. When the channel classification information is updated, the CM generates a ChannelClassificationAnnouncement message and sends the ChannelClassificationAnnouncement message to the other CM.

A table below shows CxMessage parameters of the ChannelClassificationAnnouncement message.

TABLE 103 Parameter Data type Value header CxHeader requestID payload CxPayload channelClassificationAnnouncement

A table below shows parameters of a channelClassificationAnnouncement payload.

TABLE 104 Parameter Data type Description networkID OCTET STRING Network ID chClassInfo ChClassInfo Channel classification information

Obtaining Information from Another CM

To obtain information from the other CM, the CM may perform a procedure of obtaining information from the other CM.

First, the CM generates an InfoAcquiringRequest message, sends the InfoAcquiringRequest message to the other CM, and then waits for an InfoAcquiringResponse message from the other CM.

When generating the InfoAcquiringRequest message, the CM sets CxMessage parameters as shown in a table below.

TABLE 105 Parameter Data type Value header CxHeader requestID payload CxPayload infoAcquiringRequest

A table below shows parameters of an infoAcquiringRequest payload.

TABLE 106 Parameter Data type Description ceID CxID CE ID listOfReqInfoDescr SEQUENCE OF Requested information ReqInfoDescr description list (SINR, desired bandwidth, desired occupancy, desired QoS, interface level, fairness index, fairness threshold, and subscribed service)

A table below shows CxMessage parameters of an infoAcquiringResponse message.

TABLE 107 Parameter Data type Value header CxHeader requestID payload CxPayload infoAcquiringResponse

A table below shows parameters of the infoAcquiringResponse payload.

TABLE 108 Parameter Data type Description ceID CxID CE ID reqInfo value ReqInfo value Requested information value

Negotiation Between CMs

To negotiate with the other CM for coexistence decision making, the CM may perform a negotiation procedure between CMs.

First, the CM generates a NegotiationRequest message, sends the NegotiationRequest message to the other CM, and then waits for a NegotiationResponse message from the other CM. Both an etiquette mode and a round-robin mode for a negotiation may be covered by the NegotiationRequest message.

When a competition mode is necessary for the negotiation, the CM may generate a NegotiationAnnouncement message and send the NegotiationAnnouncement message to the other CM.

A table below shows CxMessage parameters of the NegotiationRequest message.

TABLE 109 Parameter Data type Value header CxHeader requestID payload CxPayload negotiationRequest

A table below shows parameters of a negotiationRequest payload.

TABLE 110 Parameter Data type Description negotiationStatus NegotiationStatus Negotiation status (success, failure, under negotiation) negotiationInformation NegotiationInformation Negotiation information

In an exemplary embodiment, a data type of NegotiationStatus may be one of the following.

TABLE 111 Parameter Data type Description negotiationSuccess Boolean Negotiation success negotiationFailure Boolean Negotiation failure underNegotiation Boolean Under negotiation

In an exemplary embodiment, a data type of NegotiationInformation may be one of the following.

TABLE 112 Parameter Data type Description mode Boolean Negotiation success listOfChNumber SEQUENCE OF Negotiation INTEGER failure timeSharingUnitInfo TimeSharingUnitInfo Under negotiation slotTimePosition StartEndTime Allowed slot time position numberOfSlots INTEGER Number of slots DisallowedSlotTimePosition StartEndTime Disallowed slot time position listOfContentionNumbers SEQUENCE OF REAL List of contention numbers

A table below shows CxMessage parameters of the NegotiationAnnouncement message.

TABLE 113 Parameter Data type Value header CxHeader requestID payload CxPayload negotiationAnnouncement

A table below shows parameters of a negotiationRequest payload.

TABLE 114 Parameter Data type Description listOfWinnerCMID ListOfWinnerCMID List of winner CM IDs listOfSlotTimePosition ListOfSlotTimePosition List of slot time positions

Sending Reconfiguration Request from CM to Another CM

To reconfigure a WSO registered in the other CM, the CM may perform a procedure of sending a reconfiguration request from the CM to the other CM.

First, the CM generates a CMReconfigurationRequest message, sends the CMReconfigurationRequest message to the other CM, and then waits for a CMReconfigurationResponse message from the other CM.

In an exemplary embodiment, CxMessage parameters and payloads of the CMReconfigurationRequest message are as shown in Tables 115 and 116 below, respectively.

TABLE 115 Parameter Data type Value header CxHeader requestID payload CxPayload cmReconfigurationRequest

TABLE 116 Parameter Data type Description reconfigTarget CxID Indication of CE to be reconfigured OperatingChNumbers SEQUENCE Operating channel list of WSO OF INTEGER txPowerLimit REAL Transmission power limitation channelIsShared BOOLEAN True when frequency is shared with another WSO, and false otherwise. txSchedule txSchedule Transmission schedule chClassInfo ChClassInfo Channel classification information

The CM generates the above-mentioned payload for each CE registered in the other CM. The total number of payloads equals the number of CEs that are registered in the other CM but managed by the CM.

A table below shows data types of the chClassInfo parameter.

TABLE 117 Parameter Data type Description availableChannelList SEQUENCE OF INTEGER Available channel list restrictedChannelList SEQUENCE OF INTEGER Restricted channel list protectedChannelList SEQUENCE OF INTEGER Protected channel list unclassifiedChannelList SEQUENCE OF INTEGER Unclassified channel list operatingChannelList SEQUENCE OF Operating channel OperatingChannelInfo list coexistenceChannelList SEQUENCE OF Coexistence OperatingChannelInfo channel list

In an exemplary embodiment, CxMessage parameters and payloads of the CMReconfigurationResponse message are as shown in Tables 118 and 119 below, respectively.

TABLE 118 Parameter Data type Value header CxHeader requestID payload CxPayload cmReconfigurationResponse

TABLE 119 Parameter Data type Description reconfigTarget CxID Indication for CE to be reconfigured status BOOLEAN Reconfiguration parameter received through PerformReconfigurationResponse primitive failedParameters FailedParameters Failed parameters received through PerformReconfigurationResponse primitive

Master/Slave CM Selection

FIG. 10 shows a master/slave CM selection procedure according to an exemplary embodiment of the present invention. To perform centralized decision making, a master CM and a slave CM should be selected. To this end, a CM may perform a master/slave CM selection procedure. A CM intending to be a slave CM may perform the procedure for each of at least one candidate CM wanted to be a master CM. The CM intending to be a slave CM should determine a list of WSOs/CEs to be managed by the master CM.

As shown in FIG. 10, a CM first generates a MasterCMRequest message, sends the MasterCMRequest message to the other CM to notify the other CM that the CM intends to be a slave CM of the other CM receiving the message, and then waits for a MasterCMResponse message from the other CM.

In an exemplary embodiment, CxMessage parameters and a payload of the MasterCMRequest message are as shown in Tables 120 and 121 below, respectively.

TABLE 120 Parameter Data type Value header CxHeader requestID payload CxPayload masterCMRequest

TABLE 121 Parameter Data type Description listOfCEs SEQUENCE OF List of CEs managed by CM intending to CxID be slave CM

When the MasterCMRequest message is received from the CM, the other CM generates a MasterCMResponse message and sends the MasterCMResponse message to the CM.

In an exemplary embodiment, CxMessage parameters and a payload of the MasterCMResponse message are as shown in Tables 122 and 123 below, respectively.

TABLE 122 Parameter Data type Value header CxHeader requestID payload CxPayload masterCMResponse

TABLE 123 Parameter Data type Description Status CxMediaStatus status

Master/Slave CM Configuration

FIG. 11 shows a master/slave CM configuration procedure according to an exemplary embodiment of the present invention. To perform centralized coexistence decision making, a CM may perform a master/slave CM configuration procedure.

After a master/slave CM selection is successfully completed, as shown in FIG. 11, a master CM first generates a MasterSlaveCMConfigurationRequest message, sends the MasterSlaveCMConfigurationRequest message to a slave CM, and then waits for a MasterSlaveCMConfigurationResponse message from the slave CM.

In an exemplary embodiment, CxMessage parameters and a payload of the MasterSlaveCMConfigurationRequest message are as shown in Tables 124 and 125 below, respectively.

TABLE 124 Parameter Data type Value header CxHeader requestID payload CxPayload masterSlaveCMConfigurationRequest

TABLE 125 Parameter Data type Description listOfCEs SEQUENCE OF CxID List of CEs managed by master CM

After receiving the MasterSlaveCMConfigurationRequest message from the master CM, the slave CM generates a MasterSlaveCMConfigurationResponse message and sends the MasterSlaveCMConfigurationResponse message to the master CM.

In an exemplary embodiment, CxMessage parameters and payloads of the MasterSlaveCMConfigurationResponse message are as shown in Tables 126 and 127 below, respectively.

TABLE 126 Parameter Data type Value header CxHeader requestID payload CxPayload masterSlaveCMConfigurationResponse

TABLE 127 Parameter Data type Description operationCode OperationCode Operation code (new, modify, remove) ceID CxID Slave CE ID networkID OCTET STRING Network ID of WSO. For example, in case of IEEE 802.11, this parameter indicates BSSID used by WSO. networkTechnology NetworkTechnology Indication of network technology (wireless radio access technology) used by WSO networkType NetworkType Indication of network type specified in regulations discoveryInformation DiscoveryInformation Discovery information of WSO txScheduleSupported BOOLEAN Indication of whether or not scheduled transmission is supported listOfAvailableChNumbers ListOfAvailableChNumbers Information on available white space channels, list of available channel numbers listOfSupportedChNumbers SEQUENCE OF INTEGER List of Supported channel numbers listOfOperatingChNumbers ListOfOperatingChNumbers List of WSO operating channel numbers requiredResource RequiredResource Resources required for WSO operation measurementCapability MeasurementCapability Measurement capability of WSO (energy detection or failure detection) mobilityInformation MobilityInformation WSO mobility information

The slave CM generates the above-mentioned payload for each CE to be managed by the master CM. The total number of payloads equals the number of CEs that are registered in the slave CM but managed by the master CM.

In an exemplary embodiment, data types of respective elements of the listOfAvailableChNumbers parameter included in the payloads are as shown in Table 128.

TABLE 128 Parameter Data type Description channelNumber INTEGER Available channel number availableStartTime GeneralizedTime Available start time of available channel number availableDuration REAL Available duration of available channel number constOfChUses ConstOfChUses Constraints (this parameter is not used when there is no constraint)

In an exemplary embodiment, data types of respective elements of the listOfOperatingChNumbers parameter included in the payloads are as shown in Table 129.

TABLE 129 Parameter Data type Description ChannelNumber INTEGER Operating channel number occupancy REAL This parameter is not used when occupancy is not known, and indicates value of occupancy (from 0 to 1) when occupancy is known.

In an exemplary embodiment, data types of respective elements of the requiredResource parameter included in the payloads are as shown in Table 130.

TABLE 130 Parameter Data type Description requiredBandwidth REAL Required bandwidth for WSO operation occupancy REAL This parameter is not used when expected occupancy is not known, and indicates occupancy (from 0 to 1) when expected occupancy is known.

A procedure performed between a CM and a CDIS to obtain coexistence set information will be described below.

Coexistence Set Information

FIG. 12 shows an obtaining coexistence set information procedure according to an exemplary embodiment of the present invention.

To obtain coexistence set information from a CDIS, a CM may perform an obtaining coexistence set information procedure. According to the subscription service type of the CM, the CM may obtain only inter-CM coexistence set information, or inter-CM and intra-CM coexistence set information.

First, the CM generates a CoexistenceSetInformationRequest message, sends the CoexistenceSetInformationRequest message to the CDIS, and then waits for a CoexistenceSetInformationResponse message from the CDIS.

In an exemplary embodiment, CxMessage parameters and a payload of the CoexistenceSetInformationRequest message are as shown in Tables 131 and 132 below, respectively.

TABLE 131 Parameter Data type Value header CxHeader requestID payload CxPayload coexistenceSetInformationRequest

TABLE 132 Parameter Data type Description listOfNetworkID SEQUENCE OF List of network OCTET STRING IDs of WSO requiring coexistence set information

When the CoexistenceSetInformationRequest message is received, the CDIS obtains coexistence set information and sends a CoexistenceSetInformationResponse message to the CM.

In an exemplary embodiment, CxMessage parameters and payloads of the CoexistenceSetInformationResponse message are as shown in Tables 133 and 134 below, respectively.

TABLE 133 Parameter Data type Value header CxHeader requestID payload CxPayload coexistenceSetInformationResponse

TABLE 134 Parameter Data type Description networkID OCTET STRING Network ID of WSO requiring coexistence set information listOfneighborCM ListOfNeighborCM List of neighbor CMs

In an exemplary embodiment, data types of respective elements of the listOfneighborCM parameter included in the payloads are as shown in Table 135.

TABLE 135 Parameter Data type Description neighborCMID CxID Neighbor CM ID listOfCoexSetElement ListOfCoexSetElement List of neighbor WSOs

In an exemplary embodiment, the data type of each element of the listOfCoexSetElement parameter included in the payloads is as shown in Table 136.

TABLE 136 Parameter Data type Description networkID OCTET STRING Neighbor network ID networkTechnology NetworkTechnology Neighbor WSO network technology

FIG. 13 is a block diagram showing a structure of a CM according to an exemplary embodiment of the present invention.

As shown in the drawing, like a general-purpose computer system, a CM may include at least one element among at least one processor 1310, a memory 1320, a storage 1330, a user interface input unit 1340, a user interface output unit 1350, and a wireless transceiver 1360, and these may communicate with each other via a bus 1370.

The processor 1310 may be a central processing unit (CPU) or a semiconductor device that executes instructions stored in the memory 1320 and/or the storage 1330. The memory 1320 and the storage 1330 may include various types of volatile/non-volatile storage media. For example, the memory 1320 may include a read only memory (ROM) 1324 and a random access memory (RAM) 1325.

The methods of exchanging messages among entities in a coexistence management system according to the above-described exemplary embodiments of the present invention may be implemented in the form of computer-executable instructions and recorded in the memory 1320 and/or the storage 1330. When the instructions are executed by the processor 1310, a message exchanging method according to at least one exemplary embodiment of the present invention may be performed.

In an exemplary embodiment, a message defined according to Abstract Syntax Notation One (ASN.1) is as shown below.

In an exemplary embodiment, a primitive defined according to ASN.1 is as shown below.

In an exemplary embodiment, a data type defined according to ASN.1 is as shown below.

An apparatus and method according to exemplary embodiments of the present invention may be implemented in the form of program instructions that may be executed by various computer means and may be recorded in a computer-readable medium. The computer-readable medium may include program instructions, a data file, a data structure, etc., solely or in a combined manner.

The program instructions recorded in the computer-readable medium may be specially designed and configured for the present invention, or known and available to those of ordinary skill in the field of computer software. Examples of the computer-readable medium include magnetic media, such as a hard disk, a floppy disk, and a magnetic tape, optical media, such as a CD-ROM and a DVD, magneto-optical media, such as a floptical disk, and hardware devices, such as a ROM, a RAM, and a flash memory, specially configured to store and perform program instructions. The above-described medium may also be a transmission medium, such as light, a metal wire, or a waveguide including carrier waves that send signals for designating program instructions, data structures, and so on. Examples of the program instructions may include high-level language codes executable by a computer using an interpreter, etc., as well as machine language codes made by compilers.

While the invention has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. 

1. A method of exchanging messages among a coexistence enabler (CE), a coexistence manager (CM), and a coexistence discovery and information server (CDIS) in a coexistence management system including the CE, the CM, and the CDIS, the method comprising: generating, by the CM, a ReconfigurationRequest message and sending the ReconfigurationRequest message to the CE; and waiting for a ReconfigurationResponse message from the CE, wherein the ReconfigurationRequest message includes at least one among a group of an operating channel list of a white space object (WSO) served by the CE, a transmission power limitation, a flag indicating whether or not a channel is shared, a transmission schedule, and channel classification information.
 2. The method of claim 1, wherein the channel classification information includes at least one among a group of an available channel list, a restricted channel list, a protected channel list, an unclassified channel list, an operating channel list, and a coexistence channel list.
 3. The method of claim 1, further comprising: generating and sending, by the CE having received the ReconfigurationRequest message, a PerformReconfigurationRequest primitive to the WSO served by the CE; receiving, by the CE, a PerformReconfigurationResponse primitive from the WSO; and generating, by the CE, the ReconfigurationResponse message and sending the ReconfigurationResponse message to the CM, wherein the PerformReconfigurationRequest primitive includes at least one among a group of the operating channel list of the WSO served by the CE, the transmission power limitation, the flag indicating whether or not a channel is shared, the transmission schedule, and the channel classification information included in the ReconfigurationRequest message received from the CM.
 4. The method of claim 3, wherein the PerformReconfigurationResponse primitive received from the WSO includes a failure parameter indicating that reconfiguration has failed, and the ReconfigurationResponse message generated by the CE includes the failure parameter received from the WSO through the PerformReconfigurationResponse primitive.
 5. A method of exchanging messages among a coexistence enabler (CE), a coexistence manager (CM), and a coexistence discovery and information server (CDIS) in a coexistence management system including the CE, the CM, and the CDIS, the method comprising: generating, by the CM, a DeregistrationRequest message and sending the DeregistrationRequest message to the CE; waiting for a DeregistrationResponse message from the CE; and sending, by the CM, a message to the CDIS for requesting removal of the CE when the DeregistrationResponse message is received.
 6. The method of claim 5, further comprising: generating, by the CE having received the DeregistrationRequest message, a PerformDeregistrationRequest primitive, sending the PerformDeregistrationRequest primitive to a white space object (WSO) served by the CE, and waiting for a PerformDeregistrationResponse primitive from the WSO; and generating, by the CE, the DeregistrationResponse message and sending the DeregistrationResponse message to the CM when the PerformDeregistrationResponse primitive is received from the WSO, wherein the PerformDeregistrationResponse primitive includes information indicating a deregistered state of the WSO.
 7. The method of claim 5, further comprising, before the generating of the DeregistrationRequest message and the sending of the DeregistrationRequest message to the CE by the CM, generating, by the CM, a ReconfigurationRequest message, sending the ReconfigurationRequest message to the CE, and then waiting for a ReconfigurationResponse message from the CE, wherein the DeregistrationRequest message is sent to the CE when a failure parameter indicating that reconfiguration has failed is included in the ReconfigurationResponse message received from the CE.
 8. The method of claim 5, wherein the CE having received the DeregistrationRequest message switches from a management service provided by the CM to an information service.
 9. The method of claim 5, wherein the CE having received the DeregistrationRequest message subscribes to and registers for a management service provided by a new CM.
 10. A method of exchanging messages between a coexistence enabler (CE) and a coexistence manager (CM) in a coexistence management system including the CE, the CM, and a coexistence discovery and information server (CDIS), the method comprising: receiving, by the CE, an EventIndication primitive including an event parameter list from a white space object (WSO) served by the CE; generating, by the CE, an EventIndication message including the event parameter list included in the EventIndication primitive and sending the EventIndication message to the CM; and waiting for an EventConfirm message from the CM.
 11. The method of claim 10, wherein the event parameter list includes at least one of a parameter indicating reaching a signal-to-interference-plus-noise ratio (SINR) threshold and a parameter indicating degradation of quality of service (QoS).
 12. A method of exchanging messages between a coexistence enabler (CE) and a coexistence manager (CM) in a coexistence management system including the CE, the CM, and a coexistence discovery and information server (CDIS), the method comprising: receiving, by the CE, a CoexistenceReportRequest primitive from a white space object (WSO) served by the CE; generating, by the CE, a CoexistenceReportRequest message and sending the CoexistenceReportRequest message to the CM; waiting for a CoexistenceReportResponse message from the CM; and generating, by the CE, a CoexistenceReportResponse primitive and sending the CoexistenceReportResponse primitive to the WSO when a CoexistenceReportResponse message is received from the CM.
 13. The method of claim 12, wherein the CoexistenceReportResponse message includes coexistence set element information, which includes a neighbor network identifier (ID), network technology information of a neighbor WSO, and a neighbor operating channel number, of the WSO and channel priority information.
 14. A method of exchanging messages between coexistence managers (CMs) in a coexistence management system including coexistence enablers (CEs), the CMs, and a coexistence discovery and information server (CDIS), the method comprising: generating, by a CM intending to be a slave, a MasterCMRequest message and sending the MasterCMRequest message to at least one candidate CM wanted to be a master; and receiving a MasterCMResponse message from the candidate CM, wherein the CM having sent the MasterCMRequest message is set as a slave, and the candidate CM having sent the MasterCMResponse message is set as a master.
 15. The method of claim 14, wherein the MasterCMRequest message includes a list of CEs managed by the CM intending to be a slave.
 16. The method of 14, further comprising: generating, by the CM set as the master, a MasterSlaveCMConfigurationRequest message and sending the MasterSlaveCMConfigurationRequest message to the slave CM; and waiting for a MasterSlaveCMConfigurationResponse message from the slave CM.
 17. The method of claim 16, wherein the MasterSlaveCMConfigurationRequest message includes a list of CEs managed by the master CM.
 18. The method of claim 16, further comprising generating, by the slave CM, the MasterSlaveCMConfigurationResponse message and sending the MasterSlaveCMConfigurationResponse message to the master CM, wherein the MasterSlaveCMConfigurationResponse message includes at least one of an operation code, a CE identifier (ID), a network ID of a white space object (WSO), network technology information of the WSO, a network type, discovery information of the WSO, a flag indicating whether or not scheduled transmission is supported, an available channel list, a supported channel number list, a WSO operating channel list, resource information required for a WSO operation, and measurement capability information of the WSO, with regard to each of CEs to be registered in the slave CM and managed by the master CM.
 19. The method of claim 18, wherein the available channel list includes at least one of an available channel number, an available start time of the available channel number, an available duration of the available channel number, and constraint information of the available channel number.
 20. The method of claim 18, wherein the required resource information includes at least one of a required bandwidth and an expected occupancy. 